Error "Uploaded LAR file type layout-set-prototype does not match Portlet." reported when importing site template lar file

Issue

1. Go to Control Panel --> Site Templates
2. Click the icon with three vertical points in the upper right corner of the page and click Export/Import
3. Select Import section
4. Then importing a site template lar file, the error "Uploaded LAR file type layout-set-prototype does not match Portlet." will display as below.

Environment

• Liferay DXP 7.4

Resolution

Follow the steps below to resolve this error:

1. Go to Control Panel --> Site Templates
2. Create a new site template
3. Open this new site template and go to Publishing --> Import
4. Import the site template lar file